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Finding the Fourth Proportional to 1,371.60, 2,057.72 and 397.68

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Solution

The fourth proportional to 1,371.60, 2,057.72 and 397.68 is: 596.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.60 : 2,057.72 = 397.68 : x
  2. Step 2: Convert to fraction form
    1,371.60/2,057.72 = 397.68/x
  3. Step 3: Cross multiply
    1,371.60x = 2,057.72 × 397.68
  4. Step 4: Simplify right side
    1,371.60x = 818,314.09
  5. Step 5: Solve for x
    x = 818,314.09/1,371.60
  6. Step 6: Final answer
    x = 596.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.